Parts of the following post will be in dick mode. I give fair warning as some of the following have offended people greatly, especially after they have bought stuff.
The 'best' H7 headlamp, right now, is probably the
. Things change, but this one seems to be the 'best'. Used to be the Osram Rallye 65 was best, but they discontinued it.
A word about 'best': there is no free lunch. Brighter bulbs mean a shorter life. As a rule of thumb, the intensity of a halogen bulb changes as the power of 3.4 to the voltage. The life of the bulb changes as the -13 power of the voltage. Put simply, underdrive the bulb and it will be slightly dimmer and last a long time. Overdrive it and it will be slightly brighter and very short-lived. The design voltage for a halogen bulb is 12.8 volts. The way that they make high-performance bulbs is by building a filament that should be driven at 12ish volts and driving it with 12.8v. It is brighter, but the life is shorter. The difference can be hundreds of hours.
The reflector in the headlight is a parabolic shape. There is a very precise focal point in the reflector. The headlight works as designed only when a light source that is of the exact size, shape, and position as that found in an H7 headlamp. That is impossible to do with an LED light source. If anyone tells you differently you will know when they are lying; their lips will move. It's physics. Pure and simple. Physics.
The light output may be greater, but that light is not going where it is supposed to and will not conform to the requirements set forth in FMVSS 108. What there will be is either an annoying amount of glare to oncoming traffic or the light pattern as seen by the rider will be poor. If an LED was made that had a poor pattern for the rider it wouldn't sell. The manufacturer's do what they can to make a decent pattern for the rider but, due to that nasty physics shit, there is resulting glare to oncoming.
This same thing goes for HID retrofits.
This is why, if you want an LED headlight, you buy JE Speaker, Hella, Rigid, etc. and get a headlamp that is designed to work with its light source and you pay good money for it.
Some people get quite emotional about this. I tried to explain the above to a Canadian, who lives in a town the name of which was taken by a '70s pop band, and he became red-faced angry with vein-popping and spittle-flying reactions. I'm sorry, it's physics.
I will try to remember to show you my Cibie Super Oscars. Bwahahahaha!